Multifunctional weak measurement system that can measure the refractive index and optical rotation of a solution

Self Cite

A multi-channel high-throughput chiral molecule determination method based on weak value amplification (WVA) is proposed for the first time. This method can be used for high-throughput and high-precision determination of chiral molecule. Through the design of multi-channel weak measurement system, we realized the real-time, high-throughput, high-sensitivity and high-resolution detection of chiral molecules by selecting proper measurement states. In this work, we have realized a sensitivity of 11.8 nm/° and a resolution of 3.13×10-4° for measuring optical rotation. Moreover, the proposed method is successfully applied for detection of lactose content in milk samples. Furthermore, the system has the advantages of simple and robust real-time detection settings, strong stability, high measurement efficiency and good scalability. This method has important significance in clinical diagnosis, food safety and biological system.

Section: The Real-time and High-throughput L-proline Detection Based supporting

confidence: 87%

High-Throughput Chiral Molecule Determination Based on Multi-Channel Weak Measurement

Shi

Qiao

et al. 2021

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“…The axes of QWP1 and QWP2 were initially set at the horizontal and vertical direction, respectively. Based on the assumptions of previous studies [8], [13]- [16], it can be assumed that the pre and post polarization states are approximately represented as follows:…”

Section: Methodsmentioning

confidence: 99%

Optimization of the Weak Measurement System by Determining the Optimal Total Phase Difference

Shi

Liu

et al. 2021

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In this study, a method to improve the detection accuracy of a "weak measurement" system of optical rotation was proposed by determining the optimal total phase difference of the system. Analysis of the characteristics of weak measurement regime of the system under different total phase differences provided the total phase difference corresponding to the regime with the smallest ratio of system noise level to sensitivity (that is, the highest system resolution). In this regime, an optical rotation resolution of 5.522 × 10 −6°w as obtained, which is nearly an order of magnitude higher than the original system.

“…In addition, while the weak measurement theory is mostly presented for a single particle, e.g., a single photon, it could be understood either quantum mechanically or classically, and the effect of amplification is identical for classical light beams [24]- [26]. For a WVA phase measurement system achieved by a classical light beam, the photon frequency can be replaced by the spectral distribution of the light beam [27]- [29]. Thus, an inaccurate spectral distribution model will cause systematic errors in the pointer shift.…”

Section: Introductionmentioning

confidence: 99%

Pragmatic Implementation With Non-Gaussian Devices of Noise-Limited Weak Value Amplification

Luo

et al. 2021

An effective approach for general measurement based on weak value amplification using non-Gaussian broadband light sources is demonstrated. This scheme can reduce the difficulty of preparing the measurement apparatus and correcting the systematic error caused by the imperfection of device's wave function, thus making the weak-value amplification scheme more convenient and robust for practical field applications. The influence of several common noise sources in a general application based on weak value amplification is analyzed theoretically and examined experimentally. A purely imaginary weak-value phase measurement system is considered for the noise model verification experimentally. In this we show how to optimize the precision of measurement in a unique solution that takes into account the interplay between precision and uncertainty, and explicate the ramifications of such a compromising and pragmatic approach.